TY - JOUR
T1 - The interplay between genetic and environmental effects on colony insularity in the clonal invasive little fire ant Wasmannia auropunctata
AU - Vonshak, Merav
AU - Dayan, Tamar
AU - Foucaud, Julien
AU - Estoup, Arnaud
AU - Hefetz, Abraham
N1 - Funding Information:
Acknowledgements The authors wish sincerely to thank Uri Roll and David Meir for their help in the field, Armin Ionesco-Hirsh for help with the ant identification and statistical analyses, Arieh Landsman for his cheerful support in overcoming the bureaucratic obstacles, Naomi Paz for editorial advice, Tamar Katzav-Gozansky, Tovit Simon, and Osnat Malka for their help with the chemical analyses, and Anne Loiseau for her help with the molecular analyses. This research was supported by the Rieger Foundation, the Porter School of Environmental Studies, the Ministry of Environmental Protection (grant 503-6), the Israel Nature and Parks Authority, and the Jordan Valley Regional Council. The experiments presented here comply with the current laws of Israel.
PY - 2009/9
Y1 - 2009/9
N2 - The little fire ant, Wasmannia auropunctata, constitutes one clonal supercolony throughout Israel, providing an opportunity to examine the effects of genotype versus environment on nestmate recognition. Intraspecific encounters among field-collected or among laboratory-maintained colonies were nonaggressive, but encounters between freshly collected and laboratory-maintained colonies were highly aggressive. Analyses of cuticular hydrocarbons revealed that freshly field-collected colonies had distinguishable profiles. Moreover, freshly collected colonies had profiles disparate from those of the same colonies after 4 months in the laboratory. These results indicate a strong interplay between genetic-based and environmentally based effects on the recognition cues. We propose that in the field the ants' diet breadth is broad and consequently the incorporation of diet-borne substances is insufficient to mask the genetically determined cues. In the laboratory, however, the restricted diet promoted the incorporation of alien hydrocarbons at high levels, thus altering the genetically based cues to the point of alienation. These results shed a new light on the mechanisms by which environmental cues may affect label and/or template formation in ants.
AB - The little fire ant, Wasmannia auropunctata, constitutes one clonal supercolony throughout Israel, providing an opportunity to examine the effects of genotype versus environment on nestmate recognition. Intraspecific encounters among field-collected or among laboratory-maintained colonies were nonaggressive, but encounters between freshly collected and laboratory-maintained colonies were highly aggressive. Analyses of cuticular hydrocarbons revealed that freshly field-collected colonies had distinguishable profiles. Moreover, freshly collected colonies had profiles disparate from those of the same colonies after 4 months in the laboratory. These results indicate a strong interplay between genetic-based and environmentally based effects on the recognition cues. We propose that in the field the ants' diet breadth is broad and consequently the incorporation of diet-borne substances is insufficient to mask the genetically determined cues. In the laboratory, however, the restricted diet promoted the incorporation of alien hydrocarbons at high levels, thus altering the genetically based cues to the point of alienation. These results shed a new light on the mechanisms by which environmental cues may affect label and/or template formation in ants.
KW - Cuticular hydrocarbons
KW - Invasive species
KW - Nestmate recognition
KW - Wasmannia auropunctata
UR - http://www.scopus.com/inward/record.url?scp=77952670374&partnerID=8YFLogxK
U2 - 10.1007/s00265-009-0775-9
DO - 10.1007/s00265-009-0775-9
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AN - SCOPUS:77952670374
VL - 63
SP - 1667
EP - 1677
JO - Behavioral Ecology and Sociobiology
JF - Behavioral Ecology and Sociobiology
SN - 0340-5443
IS - 11
ER -